[lworld] RFR: 8377327: [lworld] SA tests fail with --enable-preview

[Frederic Parain]

On Fri, 6 Feb 2026 18:29:23 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

> This set of SA tests fail because SA tries to parse field layouts.  With Valhalla there is new field info in the field stream, which is used when --enable-preview is used since some fields are flattened.  This adds minimal support for that.
> 
> Tested with tier1-4.

LGTM

src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/oops/FieldType.java line 53:

> 51:            break;   // Ok. signature char known
> 52:        default:
> 53:          this.first = 'V'; // It's a value type.

I don't understand the purpose of this line.
In signature format, `V` means void, not value type.
And value types are encoded with a L; envelope like all classes.

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Marked as reviewed by fparain (Committer).

PR Review: https://git.openjdk.org/valhalla/pull/2064#pullrequestreview-3775127267
PR Review Comment: https://git.openjdk.org/valhalla/pull/2064#discussion_r2776114877